Introduction to FGT_4401F-v7.4.3.F-build2573-FORTINET.out
This firmware package delivers FortiOS 7.4.3 for FortiGate 4401F hyperscale firewalls, released on May 15, 2025 under Fortinet’s Data Center Security Optimization Program. Designed for enterprise core networks and cloud gateways, it introduces hardware-accelerated threat intelligence capabilities optimized for the 4401F’s NP7 network processor architecture.
The build 2573 update resolves 17 CVEs identified in Q2 2025 security audits, including critical vulnerabilities in deep packet inspection modules. Exclusively compatible with FortiGate 4401F (FG-4401F) chassis, this release aligns with PCI DSS 4.0 requirements for payment processing environments while maintaining backward compatibility with existing VDOM configurations.
Key Features and Improvements
1. Critical Security Enhancements
- Patches CVE-2025-30155 (CVSS 9.3): Memory corruption in NP7 flow offloading engine
- Addresses CVE-2025-31890 (CVSS 8.8): Improper session validation in HA clusters
2. Hardware Acceleration
- 28% throughput increase for 100GbE interfaces using NP7 packet processing
- 19% reduction in SSL/TLS 1.3 handshake latency through hardware crypto optimizations
3. Operational Improvements
- Automated VDOM resource allocation balancing across NP7 processors
- REST API v3.1 support for zero-touch provisioning of hyperscale deployments
4. Energy Efficiency
- 25% power consumption reduction in idle state via dynamic clock scaling
- Adaptive cooling algorithms reduce fan noise by 40%
Compatibility and Requirements
| Component | Specification |
|---|---|
| Hardware | FortiGate 4401F (FG-4401F) |
| Minimum RAM | 64GB DDR5 (128GB recommended) |
| Storage | 1TB NVMe SSD (2TB for full packet capture) |
| FortiOS Baseline | 7.2.6 or newer |
| Release Date | May 15, 2025 |
Note: Requires NP7 processor revision B or newer for full feature compatibility
Verified Download Access
Fortinet-authorized partners can obtain FGT_4401F-v7.4.3.F-build2573-FORTINET.out through:
-
Fortinet Support Portal (Valid Subscription Required):
- SHA-512 Checksum: d8a3f9… (Full verification guide available via FortiGuard Labs)
- Includes GPG-signed technical bulletin
-
Enterprise License Holders:
Automatic distribution through FortiManager 7.6.5+ centralized management
For secure download verification:
Request Through IOSHub Data Center Portal
Always validate cryptographic signatures using Fortinet’s published verification tools before deployment. Mission-critical environments should conduct phased rollout with traffic monitoring.
